Which statement correctly adds a label to the data set?

Which statement correctly adds a label to the data set?
A . DATA two Label="Subjects having duplicate observations"; set one; run;
B . DATA two; Label="Subjects having duplicate observations"; set one; run;
C . DATA two; set one; Label dataset="Subjects having duplicate observations"; run;
D . DATA two (Label="Subjects having duplicate observations"); set one;

Answer: D